dorsal/arxiv
View SchemaDeterministic secure direct communication by using swapping quantum entanglement and local unitary operations
| Authors | Z. J. Zhang, Z. X. Man |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0403218 |
| URL | https://arxiv.org/abs/quant-ph/0403218 |
Abstract
A deterministic direct quantum communication protocol by using swapping quantum entanglement and local unitary operations is proposed in this paper. A set of ordered EPR pairs in one of the four Bell states is used. For each pair, each of the two legitimate users owns a photon of the entangled pair via quantum channel. The pairs are divided into two types of group, i.e., the checking groups and the encoding-decoding groups. In the checking groups, taking advantage of the swapping quantum entanglement and Alice's (the message sender's) public announcement, the eavesdropping can be detected provided that the number of the checking groups is big enough. After insuring the security of the quantum channel, Alice encodes her bits via the local unitary operations on the encoding-decoding groups. Then she performs her Bell measurements on her photons and publicly announces her measurement results. After her announcement, the message receiver Bob performs his Bell measurements on his photons and directly extracts the encoding bits by using the property of the quantum entanglement swapping. The security of the present scheme is also discussed: under the attack scenarios to our best knowledge, the scheme is secure.
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"abstract": "A deterministic direct quantum communication protocol by using swapping\nquantum entanglement and local unitary operations is proposed in this paper. A\nset of ordered EPR pairs in one of the four Bell states is used. For each pair,\neach of the two legitimate users owns a photon of the entangled pair via\nquantum channel. The pairs are divided into two types of group, i.e., the\nchecking groups and the encoding-decoding groups. In the checking groups,\ntaking advantage of the swapping quantum entanglement and Alice\u0027s (the message\nsender\u0027s) public announcement, the eavesdropping can be detected provided that\nthe number of the checking groups is big enough. After insuring the security of\nthe quantum channel, Alice encodes her bits via the local unitary operations on\nthe encoding-decoding groups. Then she performs her Bell measurements on her\nphotons and publicly announces her measurement results. After her announcement,\nthe message receiver Bob performs his Bell measurements on his photons and\ndirectly extracts the encoding bits by using the property of the quantum\nentanglement swapping. The security of the present scheme is also discussed:\nunder the attack scenarios to our best knowledge, the scheme is secure.",
"arxiv_id": "quant-ph/0403218",
"authors": [
"Z. J. Zhang",
"Z. X. Man"
],
"categories": [
"quant-ph"
],
"title": "Deterministic secure direct communication by using swapping quantum entanglement and local unitary operations",
"url": "https://arxiv.org/abs/quant-ph/0403218"
},
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